Flexible coupling.



1.1. SEER ELL. FLEXIBLECOUPLING.

APPLICATION FILED AUG-29,1918

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Patented Jan. 7,1919.

JOHN J'. SEE-BELL, 0F ELIZABETH, NEW JERSEY.

FLEXIBLE COUPLING.

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. Application filed August 29.1918. Serial No. 251.988.

To all whom it" may concern:

Be it known that 1, JOHN J. SERRELL, a citizen ofthe United States, andresident of Elizabeth,-New Jersey, have invented certain new and usefulllr nproveinentsin Flexible Couplings, of which the following is aspecification.

shown in Letters Patent of the United States granted to R. A. Smith,December 28th, 1915, and numbered 1,16p",551.

I have found that considerable trouble has been experienced with thiscoupling, especially at high speed, due to the centrifugal action on thesprings, which tends to throw them outwardly away from the center of theshaft oraiiis of rotation-and produce eracessive pressure on the linecontact between the rounded surface of the pin and the wall of the slotin the sliding end of the bundle of springs.

The object of the present invention is to provide an improvedconstruction, which will be free from the troubles-due to this linecontact, and the invention includes the novel features of constructionand arrangement and combination of parts hereinafter described andparticularly defined by the appended claims.

An embodiment of my invention is illus trated in the accompanyingdrawings, in which, x

Figure 1 is an elevation, partly in section of a sufficient portion of acoupling to dis close my improvements.

Fig. 2 is a longitudinal section on line 22 of Fig. 1. Y

3 is a transverse section on line 3-3 of 1,

Figs. 4 and 5 are respectively aside elevation. and a section of one ofthe spaces pieces, and

Fig. 6 is a sectional detail.

Referring by reference numerals to this designates the keeper at one endhaving the bundle of springs 8 non-slidably held in the recess thereofby a rounded cross pin 9-, accurately fitting a round hole in the wallsof the keeper and the bundle of springs. 10 designates the op positekeeper which has a recess in which the opposite end of the bundle ofsprings is slidably-held. To avoid any line contact between the pin andthe'bundle of springs Specification of Letters Patent.

Patented Jan. a, late.

I provide a pin 11 having a fiat under side lis -which affords a broadsurface contact between the inner side or face of the pin which istoward the axis of rotation of the coupling, and the innerwall of theslot in the bundle of springs. The slot preferably conforms in shape tothe pin, that is, the 'My present invention relates to improvements inflexible couplings of the type ends of the slot are in the formofquarter (or 5/16) circles as shown. J

To maintain-true surface contact at all times one method is shownwherein the half (or 5/8) round or cylindrical portion of the ends ofthe keeper cross pin, as indicated at 10", are seated in cylindricalopenings in the keeper and are free to turn therein, so as to cause theflat portion 11 of the pin to be self adjusting with relation to thecorresponding wall of the slot.

To further improve the sliding contact I provide the spacer pieces 12with ton nos 12 cut from the body of the metal w ich are bent over atright angles and abut against each other and overlie the edges of thesprings forming the wall of the slot. This provides a smooth bearingsurface for the fiat face of the pin and avoids the necessity of havingthe said flat face bear against the laminations of the spring bundle.

The cutout portions in the spacer plates form a passage for the pin.

What I claim. is:

I. In a. flexible pina kehper, a set of superimposed leaf springs havingtheir ends seated in said keeper, and having an elongated slot, and apin having a fiat face bearing against the inner wall of the slot.

flexible pin a keeper, a set of superimposed leaf springs having theirends seated in said keeper, and having an elongated slot, and a pinhaving a flat face bearing against the inner wall of the slot, said pinbeing rotatably held with respect to said keeper.

, 3. In a flexible pin a keeper, a bundle of springs slidably held in.said keeper and having an elongated slot, 2. pin having part tongueoverlying the wall of the slot, and

a pin passing through the slot and having a fifitsurface bearing againstsaid laterally turned tongue.

i 5 5. In a flexible pin akeeper, a bundle of springs slidably held insaid keeper and having a transverse slot, spacer plates at each side ofsaid bundle of springs having integral tongues bent toward each otherand overlying the Wall of the slot, and a. 10 keeper pin passing throughthe slot. I

In testimony whereof I affix my signature.

JOHN J. SERRELL.

